Design of ultrathin hybrid membranes with improved retention efficiency of molecular dyes

Abstract

Nanocellulose–graphene oxide ultrathin coatings for water purification membranes with excellent swelling resistance, permeability and dyes retention are presented.

Pilot-scale modification of polyethersulfone membrane with a size and charge selective nanocellulose layer

“…At present, most of the nanocellulose-based coatings, films, or membrane modification strategies are based on laboratory scale or batch production of the materials, [15][16][17][18][19][20][21][22][23][24][25][26][27][28][29][30][31] although printing and papermaking companies have prioritised nanocellulose-based coatings over their synthetic counterparts [32,33]. Transferring the lab-scale approaches to continuous production lines is usually considered a major challenge, [34] which is reflected by only a limited amount of approaches attempted to be translated into industrially viable unit operations [35].…”

Charged ultrafiltration membranes based on TEMPO-oxidized cellulose nanofibrils/poly(vinyl alcohol) antifouling coating

“…[7][8][9][10] Nanocellulose membranes facilitate rejection through mechanisms involving (i) adsorption on the nanoscaled, charged surfaces (ii) size-exclusion ltration by virtue of the nanoscaled porous networks and (iii) a combination of both methods 11,12 relying on the principles similar to that of charged membranes. Porous substrates such as paper, 13 electrospun mats, 14 and commercially available microltration membranes 15 are successfully used as substrates for nanocellulose-based membrane. Ma et al demonstrated the potential of polysaccharide nanobers, including T-CNF for high ux, low-pressure water purication as a barrier layer on polyacrylonitrile (PAN) and polyethylene terephthalate (PET) nonwoven membrane.…”

Cellulose-Based Materials for Water Remediation: Adsorption, Catalysis, and Antifouling

“…The membrane showed removal efficiency of 98.8, 97.6, and 92.3% for Victoria blue B (VBB), Methyl Violet 2 B (MV2), and Rhodamine 6 G (Rh6 G), respectively (Liu et al, 2019c). TOCNF/GO was also used for the coating of a polyvinylidene difluoride (PVDF) substrate in using the blade coating technique (Liu et al, 2019b). The pristine free-standing TOCNF film exhibits poor permeability.…”

“…The membranes showed higher permeability compared to most of the common polymer-based membranes. They offered high retention efficiency of 82-99% for dyes (VBB, Rhodamine B (RhB), Methyl Orange (MO), Rh6G, Methyl Blue (MeB), and Methylene Blue (MB)) (Liu et al, 2019b).…”